Electric heater for use in connection with water-cooled gasolene-automobiles.



' G P. METCALF.

ELECTREQ HEATER FOR USE IN CONNFC'EIUN WITH WATER GOLED GASOLENEAUTOMOBHES.

APPLICATIBN FILED D C, !5. 1913.

1Qi55fi g, Patented Oct. 1915.

2 SHEEISSHEET I G. P. METCALF.

ELECTRIC HEATER FOR USE IN CONNECTION WITH WATER 000m) GASOLENEAUTOMOBILES.

APPLICATWN HLED 050.15 1913.

Patented Oct. 5, 1% 5.

2 SHEETS-SHEET 2.

enrich;

GEORGE P. IMEICALF, OF ST. PAUL, MII'GJITESGTA.

ELECTRIC. HEATER FOR. USE IN CONNEGZEION' WITH :K fiTEIR-COOLEDGASOLENE- AUTOMOBILES.

Application filed December 15, 1913.

T 0 all whom it may concern:

Be it known that I, Guo'ncn P. MnrcaLr, a citizen of the United States,residing at the city of St. Paul, county of Ramsey, and State ofMinnesota, have invented a new and useful Electric Heater for Use inConnection with v' ater-Cooled Gasolene-Automobiles, of \v ich thefollowing is a specification.

The object of my invention is to heat in a garage, or place of. storage,by means of the electric current, furnished by central power stationsfor residential lighting the Water contained in the cooling system of aWater-c0oled automobile and particularly to heat that portion of theWater surrounding the carbureter and the intake manifold there of and toaccomplish this by means of a chamber containing an electric immersionheater, otherwise described as a Water-jacket surrounding such a.heater, which chamber or vater-jacket is permanently inserted in andconnected with and made a part of a pipe line connecting the bottom ofthe automo bile radiator with the Water-jacket around the carbureter orthe intake manifold. By the intake manifold, hereinafter referred to asthe manifold, I mean the large pipe connecting the carburetor with theseveral cylinders of the motor through which pipe passes the mixture ofgasolene and air from the carburetor to the cylinders, which mix turewhen ignited causes the successive explosions in the cylinders. I attainthis ob ject by the device illustrated in the accompanying drawing.

Figure 1, represents in side elevation the relation of the motor.radialior, carbureter and manifold to the device; 2, represents anelcvationof the hating device; F 3, represents a longitudinal crosssection of the heating device, and Figs. l and 5 represent in sideelevation the relation of the motor, radiator, carbureter, manifold andheater when the Water acket is omitted from either around the carbureteror manifold.

In the ordinary Water cooled gasolene automobile, in addition to the twolarge pipes (n and 0) connecting at the top and bottom of the coolingradiator (7') with the waterjackets surrounding the" cylinders 1: w o71) there is usually anothersznall metal pipe e running from an opening(Zr) at the bottom of the radiator (,r) to an opening (Z) in theSpecification of Letters Patent.

' line running Patented Get. 5, 1915. Serial No. seems.

bottom of a Watenjacket around the carbureter (0), which Water-jacket inturn is connected at its top (Q) by pipe (6) with an opening (it) in thebottom of a water-jacket around the manifold (m), which Wateracket inturn is connected at its top by another pipe (a) With some part of theWater- ]acket surrounding the cylinders (21 o o o). In many cars thewater-jacket is omitted either from around the manifold (m) or fromaround the carbureter (c), in which case the metal pipe, before referredto, riiiis directly from the opening (k) in the bottbm of the radiator(1") to an opening in the bottom of the watenjacket, either of thecarbureter (Z) or of the manifold (t) and from the top thereof to thewater-jacket arollnd the cylinders. In Fig. 4 the acket is omitted fromaround the carbureter, While in Fig. 5 the acket is omitted from aroundthe manifold. In Fig. 5 the pipe (12) connects the upper end of thecirculating chamber of the carbureter (c) with the circulating chamberof the engine. The function of these pipes and Water-jackets is tocirculate the hot water from the cylinder water-jackets so as to raisethe temperature of the contents of the carburcter and manifold or eitherof them and assist vaporization of the gaseous fuel and preventcondensation. I

My invention consists of inclosing the heating portion of an electricimmersion heater (7 of any suitable shape, size or make, in a Watertight metal chamber (71,) or Water-jacket, (which chamber or Waterackethas a small opening at either end 7 and g) or at the top and bottomthereof) and of connecting the chamber (71.) or *aterjacket at theseopenings with the pipe from the opening, (70) in the base of theradiator (r) to the lower opening (Z) of the Water-jacket aroundthecarbureter (c) (or with that of the manifold t if the carbureter have noWater-jacket) so that the Water passing through such line shall passthrough such Water-jacket, (see Fig. v

Hereafter I shall refer to the chamber or water-jacket surrounding theelectric immersion hater as'the heatingchamber and theelectric immersionheater as the heating element. I

The heating chamber (it) should be of metal but may be of any shape orsize. While I prefer a heating element (z') in the chamber (h) or vshape of a. straight rod, thisis not essential and any convenient shapeWill be practicable. It will be found convenient, but not necessary, tohave threaded nipples made to project from the openings (o and 7") ofthe heating dhamb'er (h). The heating Chill her (It) should be of amplesize to prevent any part of the heating element (2') touchthe heatingelement is aliixed screwed to one end of the heating chamber (it) ratherthan to have the heating chamber (In) cast in one piece, for the reasonthat the electric heat ing element ('5) is then accessible and can bereadily removed, repaired or changed, Without disturbance of the heatingchamber (h). I

Toinstall and operate this device, the pipe before referred to, as partof an automobile and as leading from the opening (it) in the foot of theradiator (r) to the opening (Z) at the base of the Water-jacket of thecarhureter (0) should be out. One opening (7') of the heating element(h) should be joined either directly to the lower opening (Z) in heWater-jacket around thecarbureter (0) or to that portion. of the pipe soout (fil leading directly to the carburetcr to) If the manifold alonehave a Water-jacket (so Fig. 4.) then the heating element should bepiped from one end to the opening (is) in the foot of the radiator (7 tothe opening and from its other end (6') at the base of the Wateujacketaround the manifold (m). Irrespective of Whether; the opening" 7') isconnected with the Water-jacket around the carburetor or manifold, theother opening (g) in the heating chamber should be joined to the pipe(6) leading to the bottom (is) of .the radiator In this Way the chainher(h) Will'he filled with Water and the heating element (2'). completelysurrounded by it.- There also Will be a free passage of Water from theradiator (r) (see Fig. l.)

through the pipe (e) and the heating" Cl1{ll'fk ient manner With thecentral station electric current. moms (w) through the radiator (r) tosome I prefer, however, to run these greases standard wall plugreceptacle (8) permanently fastened to the front of the automobile. Toput the device in operation I insert into this receptacle (8). a plugwith the lighting current.

When the heating element (11) is connected with a proper current, thehot Water generated by contact with the heating element (c') in theheatingchamber (h) wvill rise through the pipe to the Water-jacketaround the carburetor (c) thence through the pipe (Z1) to theWater-jacket around the manifold (an) thence through the pipe (1) to theWater-jacket surrounding the cylinders ('2; o o o), and thence circulatethrough the large pipe connections (n and 0) to the radiator (r andreturn by the small pipe 6) to the heating chamber In this Way the heatgenerated keeps the Water surrounding the carbureter hot and thatsurrounding the manifold (m) very warm, While that around the enginecylinders (o e r v) is kept fairly Warm and that in the radiator (r)above the freezing point.

It will be particularly noted that the heater, carburetor, manifold,engine and radiator are so arranged that the flow of thecirculatingmedium egressing from the heater is in an upward direction,first through the carburetor, and thence through the manifold, engine,radiator and back to the heater,

connected the liquid circulating chambers in said car bureter, manifoldand engine being superimposed successively. By thus applying the hottestpart of the heating medium to the carburetor and manifold the fuel ismost efliciently vaporized so as to explode in the cylinders whenignited. The exact amount of heat given off is determinedby the size andby the current consumption of the heating element and may be regulatedto suit the Wishes of the user.

I am aware that an electric immersion heater has been used to Warm theWater in the cooling system of water cooled automobiles by dropping itinto the neck (p) of the radiator (r) and that a'gas heater is i madeand sold designed to be hung temporarily in front of the radiator andconnected with it by rubber tubes. The advantage attained by the use ofmy invention oyer those mentioned is that when once installed it may beput into operationinore quickly if the Water falls below the level ofthe upper radiator connection, circulation continues nevertheless; theheat generated goes to the carburetor (c), thence to the manifold (m),thence to the cylinders (12 c c c), thence to the radiator (7 theimportance of heating which parts varies in the order named. Inconsequence of the above I do not claim the electric immersion heaterper $6; I do not claimv the heating of the Water'in the Water cooledautomobiles by an electric immersion heater broadly, nor do I claim thewetoracketed feature of an automobile, carbureter, manifold or any partor portion ofan automobile but 1. The combination with the cylinder andradiator of an explosion engine of pipes be tween the same to circulatecooling liquid,

- a heater having a liquid circulating chainher connected with saidpipes and a carbureter having a liquid circulating chamber connectedwith said pipes and situated adjacent to said heater whereby the hottestportion ofthe circulating liquid passes through said chamber of saidcarbureter.

2. The combination with the cylinder and radiator of an explosion engineof a duct between the same to circulate a cooling liquid, a carburetorhaving a liquid circulating chamber and a manifold having a liquidcirculating chamber, said liquid circulatirfg chambers of saidcarbureter and manifold being connected in series with said radiator andcylinder by said duct, and a heater having a liquid circulating chamberconnected with said duct and situated adjacent said carbureter, wherebythe hottest portion of the circulating liquid is conveyed through saidchamber of said carbureter first, for the purpose specified.

3. The combination with the cylinder and radiator of an explosion engineof piping between the same to circulate cooling liquid and a heater andcarburetor having liquid circulating chambers connected with saidpiping, the chamber of said carbureter being placed adjacent the chamberof said heater and below the liquid circulating chamber of said cylinderso that the hottest portion of the circulating liquid passes through thecirculating chamber of said carbureter, immediately after egressing fromthe heater and before passing into the circulating chamber of thecylinder.

4. The combination with an explosive engine comprising a jacketedcarbureter, cylinder and a radiator having pipes connecting them incircuit, of a liquid heating chamber interposed in said circuit todeliver primarily into the jacket of said carbureter.

5. The combination with an explosive engine comprising a jacketedcarbureter, cylinder and a radiator having pipes connecting them incircuit, of a chamber containing liquid and interposed in said circuitto deliver primarily into the jacket of said carbureter, and an electricheater disposed within said chamber v The above specification signed atthe city of St. Paul, county of Ramsey and State of Minnesota, this 29thday of November, 1913.

GEO. P. METCALF. In presence of WILLIAM G. GRAVES, C. C. REED.

